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Finding the Fourth Proportional to 98,687, 136,191.30 and 53,975

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Solution

The fourth proportional to 98,687, 136,191.30 and 53,975 is: 74,487.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,687 : 136,191.30 = 53,975 : x
  2. Step 2: Convert to fraction form
    98,687/136,191.30 = 53,975/x
  3. Step 3: Cross multiply
    98,687x = 136,191.30 × 53,975
  4. Step 4: Simplify right side
    98,687x = 7,350,925,417.50
  5. Step 5: Solve for x
    x = 7,350,925,417.50/98,687
  6. Step 6: Final answer
    x = 74,487.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.